CN110547031A

CN110547031A - Communication device, base station device, method, and recording medium

Info

Publication number: CN110547031A
Application number: CN201880027403.1A
Authority: CN
Inventors: 示沢寿之; 草岛直纪; 松田大辉
Original assignee: Sony Corp
Current assignee: Sony Corp
Priority date: 2017-05-01
Filing date: 2018-03-09
Publication date: 2019-12-06
Anticipated expiration: 2038-03-09
Also published as: US11122618B2; EP3621401B1; EP3621401A1; CN110547031B; JP2018191104A; JP2022009449A; WO2018203441A1; TW201842796A; TWI773750B; US20210360689A1; EP3621401A4; US20200059960A1

Abstract

[ problem ] to provide a mechanism capable of improving the transmission efficiency of the entire system in an environment where dynamic resource sharing is performed. [ solution ] A communication apparatus for communicating with a base station apparatus for receiving first uplink data transmitted in a grant-less manner and second uplink data transmitted in a grant-based manner, the communication apparatus comprising: a setting unit configured to perform setting related to a resource capable of unlicensed transmission based on setting information received from the base station apparatus; and a communication processing unit for receiving a downlink control channel including parameter information for unlicensed transmission through a predetermined first slot, and transmitting first uplink data generated based on the parameter information by using an uplink resource selected from resources capable of unlicensed transmission.

Description

Communication device, base station device, method, and recording medium

Technical Field

The present disclosure relates to a communication apparatus, a base station apparatus, a method, and a recording medium.

Background

Wireless access schemes and wireless networks for cellular mobile communication (hereinafter, also referred to as "Long Term Evolution (LTE)", "LTE-Advanced (LTE-a)", "LTE-Advanced Pro (LTE-a Pro)", "5G (generation 5)", "New Radio (NR)", "New Radio Access Technology (NRAT)", "Evolved Universal Terrestrial Radio Access (EUTRA)" or "further EUTRA (feutra)") are studied in the third generation partnership project (third generation partnership project: 3 GPP). Note that in the following description, LTE includes LTE-A, LTE-a Pro and EUTRA, and NR includes NRAT and FEUTRA. In LTE and NR, a base station apparatus (base station) is also referred to as eNodeB (evolved node B) in LTE and also referred to as gdnodeb in NR. The terminal apparatus (mobile station, mobile station apparatus, terminal) is also called UE (user equipment). Each of LTE and NR is a cellular communication system of a cellular arrangement including a plurality of areas covered by a base station apparatus. A single base station apparatus may manage a plurality of cells.

NR is a next generation radio access scheme of LTE, and is a RAT (radio access technology) different from LTE. NR is an access technology that may correspond to various use cases including eMBB (enhanced mobile broadband), mtc (large-scale machine type communication), and URLLC (ultra-reliable and low-latency communication). NR is studied for a technical framework corresponding to a use scenario, a requirement, an arrangement scenario, and the like of a use case. Details of the scenario and requirements of NR are disclosed in non-patent document 1.

In URLLC, it is desirable to achieve low delay (low latency) transmission. Specifically, in uplink transmission of URLLC, it is studied to achieve reduction of delay by simplifying control necessary for data transmission of a terminal. In the case where uplink data is generated in a terminal in a conventional uplink transmission method, the terminal first issues a resource allocation request for uplink transmission to a base station, and then the base station notifies the terminal of control information (uplink grant, uplink allocation) for allocating resources for uplink transmission. The terminal uses the allocated resources for uplink transmission. Such a control step is performed each time an uplink transmission is made, which causes a delay.

Therefore, resources for uplink transmission are allocated in advance, and in the case where data is generated in the terminal, the terminal uses the pre-allocated transmission available resources for uplink transmission. This can shorten the time from data generation to data transmission, and can realize low-delay transmission. Such transmissions are referred to as unlicensed transmissions. Details of the unlicensed transmission are disclosed in non-patent document 2.

Also, the eMBB is broadband transmission, and transmits data based on a predetermined slot length. Further, URLLC includes low-delay (low-latency) transmission, and data is transmitted in time units (mini-slots) shorter than the slot length of eMBB. That is, the TTI (transmission time interval) in URLLC is shorter than the TTI in eMBB. Thus, data transmission by URLLC may occur after data transmission by eMBB has begun. An example of a method of multiplexing data of the eMBB and data of the URLLC includes frequency division multiplexing. However, it is necessary to maintain frequency resources for data transmission of URLLC, and in the case where the frequency of data transmission of URLLC is low, the use efficiency of resources is reduced.

Therefore, dynamic resource sharing of eMBB and URLLC is studied in NR. When data transmission of URLLC occurs in dynamic resource sharing between eMBB and URLLC, data of URLLC may be transmitted while overlapping the data of URLLC with resources in a slot in which the data of eMBB is transmitted. Although the overlaps are interference with each other, a reduction in the use efficiency of resources can be improved. Non-patent document 3 discloses details of dynamic resource sharing between the eMBB and the URLLC.

reference list

Non-patent document

[ non-patent document 1]3rd Generation Partnership Project; technical Specification Group Radio Access Network; study on scenes and requirements for Next Generation Access Technologies; (Release 14),3GPP TR 38.913V0.3.0(2016-03). Internet < URL: http:// www.3gpp.org/ftp/Specs/archive/38_ series/38.913/38913-030.zip >

[ non-patent document 2] R1-1704222, "Grant-free transmission for UL URLLC," Huawei, Hisilicon,3GPP TSG RAN WG1 Meeting #88b, 4 months in 2017. The Internet < URL: http:// www.3gpp.org/ftp/Meetings _3GPP _ SYNC/RAN1/Docs/R1-1704222.zip >

[ non-patent document 3] R1-1611545, "Dynamic Resource Sharing for eMB/URLLC in DL," Sony,3GPP TSG RAN WG1 Meeting #87,2016, 10 months. The Internet < URL:// www.3gpp.org/ftp/tsg _ ran/WG1_ RL1/TSGR1_87/Docs/R1-1611545.zip >

Disclosure of Invention

Technical problem

In an environment where resources such as eMBB data and URLLC data may overlap in uplink transmissions, interference to URLLC data dynamically changes depending on whether eMBB data is present or not. It is therefore desirable to be able to dynamically control parameter information for uplink transmission of URLLC data in accordance with dynamically changing interference. Otherwise, non-optimal parameter information will be used, which reduces transmission efficiency.

Thus, the present disclosure provides a mechanism that can improve the transmission efficiency of the entire system in an environment where dynamic resource sharing is performed.

Solution to the problem

According to the present disclosure, there is provided a communication apparatus that communicates with a base station apparatus that receives first uplink data of grant-less transmission and second uplink data of grant-based transmission, the communication apparatus including: a setting unit that performs setting on an unlicensed transmission available resource based on setting information received from the base station apparatus; and a communication processing unit that receives a downlink control channel including parameter information for the unlicensed transmission in a predetermined first slot, and transmits first uplink data generated based on the parameter information using an uplink resource selected from the available resources for the unlicensed transmission.

Further, according to the present disclosure, there is provided a base station apparatus communicating with a first communication apparatus for grant-less transmission of first uplink data and a second communication apparatus for grant-based transmission of second uplink data, the base station apparatus comprising: a setting unit that transmits setting information on an available resource for unlicensed transmission to the first communication device; and a communication processing unit that transmits a downlink control channel including parameter information for the unlicensed transmission in a predetermined first slot, and receives first uplink data generated based on the parameter information, the first uplink data being transmitted from the first communication device using an uplink resource selected from the resources available for unlicensed transmission.

Further, according to the present disclosure, there is provided a method performed by a communication apparatus communicating with a base station apparatus that receives first uplink data of a grant-less transmission and second uplink data of a grant-based transmission, the method comprising: performing setting on an available resource for unlicensed transmission based on setting information received from the base station apparatus; and receiving a downlink control channel including parameter information for the unlicensed transmission in a predetermined first slot, and transmitting first uplink data generated based on the parameter information using an uplink resource selected from the available resources for the unlicensed transmission.

Further, according to the present disclosure, there is provided a method performed by a base station apparatus communicating with a first communication apparatus for grant-less transmission of first uplink data and a second communication apparatus for grant-based transmission of second uplink data, the method comprising: transmitting setting information on resources available for the unlicensed transmission to the first communication device; and transmitting a downlink control channel including parameter information for the unlicensed transmission in a predetermined first slot, and receiving first uplink data generated based on the parameter information, the first uplink data being transmitted from the first communication apparatus using an uplink resource selected from the resources available for the unlicensed transmission.

Further, according to the present disclosure, there is provided a recording medium recording a program for causing a computer to function as a communication apparatus that communicates with a base station apparatus that receives first uplink data of a grant-less transmission and second uplink data of a grant-based transmission, the communication apparatus including: a setting unit that performs setting on an unlicensed transmission available resource based on setting information received from the base station apparatus; and a communication processing unit that receives a downlink control channel including parameter information for the unlicensed transmission in a predetermined first slot, and transmits first uplink data generated based on the parameter information using an uplink resource selected from the available resources for the unlicensed transmission.

Further, according to the present disclosure, there is provided a recording medium recording a program for causing a computer to function as a base station apparatus that communicates with a first communication apparatus for grant-less transmission of first uplink data and a second communication apparatus for grant-based transmission of second uplink data, the base station apparatus including: a setting unit that transmits setting information on an available resource for unlicensed transmission to the first communication device; and a communication processing unit that transmits a downlink control channel including parameter information for the unlicensed transmission in a predetermined first slot, and receives first uplink data generated based on the parameter information, the first uplink data being transmitted from the first communication device using an uplink resource selected from the resources available for unlicensed transmission.

According to the present disclosure, parameter information for unlicensed transmission is notified to a communication apparatus that performs unlicensed transmission through a control channel. As a result, the base station apparatus can dynamically control the parameter information for the unlicensed transmission. Accordingly, the communication apparatus can appropriately update the parameter information for the unlicensed transmission to the optimal parameter information according to the presence or absence of interference that dynamically occurs between the first uplink data of the unlicensed transmission and the second uplink data of the grant-based transmission. As a result, the transmission efficiency of the entire system can be improved.

Advantageous effects of the invention

As described above, according to the present disclosure, a mechanism is provided which can improve the transmission efficiency of the entire system in an environment where dynamic resource sharing is performed. Note that the advantageous effect may not be limited, and any of the advantageous effects shown in the present specification or other advantageous effects that can be understood from the present specification may be obtained in addition to or instead of the advantageous effect.

Drawings

fig. 1 is a diagram showing an overall configuration of a system according to an embodiment of the present disclosure.

Fig. 2 is a diagram showing an example of a frame configuration of NR.

Fig. 3 is a diagram showing a configuration example of an eMBB slot and a URLLC slot.

Fig. 4 is a sequence diagram showing an example of the flow of the grant-based transmission process of the base station apparatus 100 and the eMBB terminal 300 according to the present embodiment.

Fig. 5 is a sequence diagram showing an example of the flow of the license exempt transmission process of the base station apparatus 100 and the URLLC terminal 200 according to the present embodiment.

Fig. 6 is a block diagram showing a configuration example of the base station apparatus 100 according to the present embodiment.

Fig. 7 is a block diagram showing a configuration example of the URLLC terminal 200 according to the present embodiment.

Fig. 8 is a diagram for describing an example of dynamic resource sharing according to the present embodiment.

Fig. 9 is a diagram for describing an example of dynamic resource sharing according to the present embodiment.

Fig. 10 is a diagram for describing the setting processing of the license exempt transmission parameter information according to the present embodiment.

Fig. 11 is a sequence diagram for describing an example of the flow of the setting process of the license exempt transmission parameter information according to the present embodiment.

Fig. 12 is a block diagram showing a first example of a schematic configuration of an eNB.

Fig. 13 is a block diagram showing a second example of the schematic configuration of an eNB.

Fig. 14 is a block diagram showing an example of a schematic configuration of a smartphone.

Fig. 15 is a block diagram showing an example of a schematic configuration of a car navigation device.

Detailed Description

Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Note that in the present specification and the drawings, the same reference numerals are given to constituent elements having substantially the same functional configuration, and the description will not be repeated.

Note that the embodiments will be described in the following order.

1. Introduction to

1.1. Integral arrangement

1.2. Correlation technique

2. Configuration example of each device

2.1. Configuration example of base station apparatus

configuration example of URLLC terminal

3. Characteristic of the technology

3.1. Dynamic resource sharing

3.2. Parameter information

3.2.1. Authorization-free transmission of parameter information

3.2.2. authorization-based transmission parameter information

3.3. Notification method of authorization-free transmission parameter information

3.4. Application period for license-free transmission of parameter information

3.5. Modification examples

4. Application example

4.1. Application example of base station device

4.2. Application example with respect to terminal device

5. Conclusion

<1. introduction >

<1.1. Overall arrangement >

Fig. 1 is a diagram showing an overall configuration of a system according to an embodiment of the present disclosure. As shown in fig. 1, the system 1 includes a base station apparatus 100, a terminal apparatus 200, a terminal apparatus 300, a core network 20, and a PDN (packet data network) 30.

The base station apparatus 100 operates the cell 11 and provides a wireless communication service to one or more terminal apparatuses located inside the cell 11. The cell 11 operates according to any wireless communication manner such as LTE and NR, for example. The base station apparatus 100 is connected to the core network 20. The core network 20 is connected to the PDN30 through a gateway device (not shown).

The core network 20 may include, for example, an MME (mobility management entity), an S-GW (serving gateway), a P-GW (PDN gateway), a PCRF (policy and charging rules function), and an HSS (home subscriber server). The MME is a control node that processes signals of the control plane, and manages the mobility state of the terminal device. The S-GW is a control node that processes a signal of the user plane, and is a gateway device that switches a transmission path of user data. The P-GW is a control node that processes signals of the user plane, and is a gateway apparatus that is a connection point of the core network 20 and the PDN 30. The PCRF is a control node that performs control regarding policy and charging, such as QoS (quality of service) of a bearer. The HSS is the control node that handles member data and controls services.

terminal apparatuses 200 and 300 are communication apparatuses that wirelessly communicate with base station apparatus 100 based on control of base station apparatus 100. Terminal apparatuses 200 and 300 may be so-called user terminals (UEs: user equipments). For example, terminal apparatus 200 and terminal apparatus 300 transmit an uplink signal to base station apparatus 100 and receive a downlink signal from base station apparatus 100.

Specifically, the terminal apparatus 200 is a URLLC terminal, and transmits and receives a URLLC signal to and from the base station apparatus 100. The URLLC terminal 200 corresponds to a first terminal apparatus that performs grant-less transmission of URLLC data (first uplink data). The terminal device 300 is an eMBB terminal that transmits an eMBB signal to the base station device 100 and receives an eMBB signal from the base station device 100. The eMBB terminal 300 corresponds to a second terminal apparatus that performs grant-based transmission of eMBB data (second uplink data). In the case where no distinction is required, the URLLC terminal 200 and the eMBB terminal 300 will also be referred to as terminal apparatuses.

<1.2. related Art >

Hereinafter, a technique related to the present technology will be described.

(1) Frame configuration of NR

The frame configuration (in other words, slot format or slot configuration) of the NR may be defined by a subframe, a slot, or a mini slot. The subframe includes fourteen symbols, and the subframe may be used to define a frame configuration in a reference subcarrier spacing (in other words, a prescribed subcarrier spacing). A slot is a symbol period in a subcarrier interval for communication, and the slot includes seven or fourteen symbols. The number of symbols included in one slot may be set exclusively for a cell from the base station apparatus 100 or exclusively for a terminal apparatus. The number of symbols included in the mini-slot may be smaller than the number of symbols included in the slot. For example, the number of symbols in one mini slot may be one to six, and the number of symbols may be set specifically for a cell or specifically for a terminal device from the base station device 100. Both the time slot and the mini-slot may be used as a resource unit for communication in the time domain. For example, a timeslot is used in communication of eMBB and mtc, and a mini-timeslot is used in communication of URLLC. Further, the names of the slots and mini-slots may not be distinguished.

Fig. 2 is a diagram showing an example of a frame configuration of NR. Fig. 2 shows a frame configuration in a predetermined frequency domain. For example, the predetermined frequency domain includes resource blocks, sub-bands, system bandwidths, and the like. Accordingly, the frame configuration as shown in fig. 2 may be frequency multiplexed and/or spatially multiplexed.

In NR, one slot includes downlink communication, a Guard Period (GP), and/or downlink communication. The downlink communications include downlink channels such as NR-PDCCH (physical downlink control channel) and/or NR-PDSCH (physical downlink shared channel). Further, the downlink transmission includes reference signals associated with the NR-PDCCH and/or the NR-PDSCH. The uplink communication includes uplink channels such as NR-PUCCH (physical uplink control channel) and/or NR-PUSCH (physical uplink shared channel). Further, the downlink communications include reference signals associated with the NR-PUCCH and/or the NR-PUSCH. The GP is a time domain that does not send any content. For example, the GP is used to adjust the time for switching from reception of downlink communication to transmission of uplink communication in the terminal apparatus, the processing time in the terminal apparatus, and/or the transmission timing of uplink communication.

as shown in fig. 2, the NR may use various frame configurations. The frame configuration C1 includes NR-PDCCH, NR-PDSCH, GP, and NR-PUCCH. In the NR-PDCCH, allocation information of the NR-PDSCH is transmitted, and HARQ-ACK for the received NR-PDSCH is transmitted through the NR-PUCCH in the same slot. The frame configuration C2 includes NR-PDCCH, GP, and NR-PUSCH. In the NR-PDCCH, allocation information of the NR-PUSCH is transmitted, and the NR-PUSCH is transmitted through allocated resources in the same slot. In frame configurations such as frame configurations C1 and C2, downlink communication and uplink communication are completed within the same time slot, and the frame configuration is also referred to as a self-contained frame.

The frame configurations C3 to C7 are frame configurations including only downlink communication or uplink communication. More specifically, the frame configuration C3 includes NR-PDCCH and NR-PDSCH. The frame configuration C4 includes NR-PDSCH. The frame configuration C5 includes NR-PUSCH. The frame configuration C6 includes NR-PDCCH. Frame configuration C7 includes the NR-PUCCH. In frame configuration C3, the NR-PDSCH may be scheduled through the NR-PDCCH in the same slot. In the frame configurations C4 and C5, NR-PDSCH and NR-PUSCH may be scheduled by mapping NR-PDCCH, RRC signaling, etc. in different slots.

the frame configuration C8 is a frame configuration used as a field as a guard period in which no communication is performed in the entire time slot or as a blank time slot. Further, the time slot as shown in the frame configuration C8 may be used as a time slot for extension in the future. Conventional terminal devices simply assume such a slot as a blank slot, and the slot may be used to transmit data or signals to the terminal device corresponding to the new spreading technique.

(2) Signal waveform

In the present embodiment, a plurality of types of signal waveforms (waveforms) are specified in the uplink. For example, two uplink signal waveforms may be specified, and the waveforms may be referred to as a first signal waveform and a second signal waveform. In the present embodiment, the first signal waveform is CP-OFDM (cyclic prefix-orthogonal frequency division multiplexing), and the second signal waveform is SC-FDMA (single carrier-frequency division multiple access). Further, the second signal waveform is also referred to as DFT-s-OFDM (discrete fourier transform-spread-orthogonal frequency division multiplexing).

That is, the first signal waveform is a multi-carrier signal, and the second signal waveform is a single-carrier signal. Further, the first signal waveform is the same as the downlink signal waveform in LTE and NR, and the second signal waveform is the same as the uplink signal waveform in LTE.

The signal waveform may vary in power efficiency, transmission (generation) method, reception method, resource mapping, and the like. For example, the second signal waveform can reduce PAPR (peak to average power ratio) compared to the first signal waveform, and is superior in power efficiency. Further, the first signal waveform allows frequency multiplexing of the reference signal with data in the frequency direction, and is superior to the second signal waveform in terms of transmission efficiency. In addition, when frequency domain equalization is required in the reception processing of the second signal waveform, the load of the reception processing of the second signal waveform is higher than that of the reception processing of the first signal waveform. Further, the first signal waveform has a narrower subcarrier interval than the second signal waveform, and the first signal waveform is susceptible to phase noise, particularly in a high frequency band.

(3) User multiplexing mode

in Orthogonal Multiple Access (OMA), for example, an orthogonal frequency axis and a time axis are used for transmission and reception. In this case, the subcarrier spacing determines the frame configuration of frequency and time resources, and resources equal to or greater than the number of resource elements cannot be used.

On the other hand, in non-orthogonal multiple access (NOMA), in addition to an orthogonal frequency axis and a time axis (orthogonal resource), a frequency configuration is determined using a non-orthogonal axis (non-orthogonal resource). For example, the non-orthogonal resources include an interleaving mode, a spreading mode, a scrambling mode, a codebook, and power. In the case of user multiplexing using non-orthogonal multiple access, the receiver side can separate multiplexed signals using an interference canceller based on a non-orthogonal resource pattern applied to each multiplexed signal.

For example, each terminal device applies a non-orthogonal resource pattern corresponding to uplink transmission. The non-orthogonal resource pattern is also referred to as MA signature (multiple access signature). The signal to which the MA signature is applied is transmitted from each terminal apparatus through the same frequency and time resources. Here, the MA signature includes, for example, an interleaving mode, an extension mode, a scrambling mode, a codebook, power allocation, and the like. Note that instead of MA signatures, non-orthogonal resource patterns may be referred to simply as patterns or indices. In this case, the non-orthogonal resource pattern indicates, for example, an identifier (such as a pattern and an index) used in NOMA as described above, or indicates the pattern itself.

(4) resource configuration for eMBB and URLLC

In NR, data having different TTI (transmission time interval) lengths can be flexibly transmitted as in eMBB and URLLC. The TTI length, which is a transmission unit of the eMBB terminal 300, is provided by an eMBB slot (transmission frame of eMBB, also referred to as eMBB frame), and the TTI length, which is a transmission unit of the URLLC terminal 200, is provided by a URLLC slot (transmission frame of URLLC, also referred to as URLLC frame). The time length of the URLLC slot (URLLC slot length) is shorter than the time length of the eMBB slot (eMBB slot length). Hereinafter, URLLC and eMBB slots will also be referred to simply as slots.

URLLC and eMBB slots are specified or set by the number of symbols and/or the symbol length. Here, the symbol length is a time length of one symbol, and is determined with respect to a subcarrier interval in the OFDM signal. Specifically, in the case where the subcarrier spacing is n times, the symbol length is n times.

For example, the URLLC and eMBB slots have the same symbol length and are determined by different numbers of symbols. Specifically, a URLLC slot includes two symbols, and an eMBB slot includes seven or fourteen symbols. Fig. 3 is a diagram showing a configuration example of an eMBB slot and a URLLC slot. In the example shown in fig. 3, the URLLC and eMBB slots have the same symbol length. The eMBB slot includes fourteen symbols and the URLLC slot includes two symbols.

Also, for example, the URLLC slot and the eMBB slot have the same number of symbols and are determined by different symbol lengths (i.e., different subcarrier spacings). Specifically, the eMBB slot includes seven symbols, and provides an OFDM signal at a subcarrier interval of 15 kHz. The URLLC slot includes seven symbols and provides an OFDM signal at a subcarrier spacing of 60 kHz. In this case, the URLLC slot length is one-fourth of the eMBB slot length.

(5) Grant-based and license-free transmission

The eMBB terminal 300 performs grant based transmission in the uplink. The grant-based transmission is a transmission method of receiving resource allocation from the base station apparatus 100 each time data to be transmitted is generated. More specifically, the eMBB terminal 300 receives allocation of uplink resources for grant-based transmission (hereinafter, also referred to as grant-based transmission resources) from the base station apparatus 100 at the timing of generating data to be transmitted. Further, the eMBB terminal 300 transmits data using the allocated grant-based transmission resources.

Grant based transmission resources are dynamically set through a control channel or the like.

URLLC terminal 200 performs an unlicensed transmission in the uplink. The unlicensed transmission is a method of receiving a resource allocation from the base station apparatus 100 in advance and transmitting data using the allocated resource when generating data to be transmitted. More specifically, the base station apparatus 100 allocates a predetermined uplink resource for the unlicensed transmission (hereinafter, also referred to as an unlicensed transmission available resource) to the URLLC terminal 200. In the case of generating data for uplink transmission, the URLLC terminal 200 selects resources to be used for transmission from among the resources available for unlicensed transmission, and transmits the data using the selected resources.

The resource available for unlicensed transmission is statically or quasi-statically set by RRC signaling to information specific to the base station apparatus 100 or to the URLLC terminal 200. The grant-free transmission available resources may be set in the time direction by periodic resources determined by a predetermined period and/or by a predetermined offset, consecutive URLLC slots from a predetermined starting position, etc.

Hereinafter, the flow of grant-based transmission and grant-less transmission will be described with reference to fig. 4 and 5.

Fig. 4 is a sequence diagram showing an example of the flow of the grant-based transmission process of the base station apparatus 100 and the eMBB terminal 300 according to the present embodiment. As shown in fig. 4, when data to be transmitted is generated by user input or the like, the eMBB terminal 300 first issues a resource allocation request to the base station apparatus 100 (step S12). Next, the base station apparatus 100 performs resource allocation (step S14). In addition, the eMBB terminal 300 transmits data using the resource allocated from the base station device 100 in step S14 (step S16). Next, the base station device 100 receives the data and returns a response such as ACK/NACK to the eMBB terminal 300 (step S18). Next, the eMBB terminal 300 outputs the received response to the user or the like.

Fig. 5 is a sequence diagram showing an example of the flow of the license exempt transmission process of the base station apparatus 100 and the URLLC terminal 200 according to the present embodiment. As shown in fig. 5, the base station apparatus 100 first performs resource allocation (step S22). The resources allocated here are the resources available for unlicensed transmission. The URLLC terminal 200 does not use the allocated grant-free transmission available resources until data to be transmitted is generated. When data to be transmitted is generated by user input or the like, the URLLC terminal 200 transmits the data using the allocated license-exempt transmission available resource (step S24). Next, the base station apparatus 100 receives the data and returns a response such as ACK/NACK to the base station apparatus 100 (step S26). Next, the URLLC terminal 200 outputs the received response to the user or the like.

comparing fig. 4 and fig. 5, the time from generation of data to be transmitted to completion of transmission or the response time from generation of data to be transmitted to obtaining a response is shorter in the grant-less transmission than in the grant-based transmission. Therefore, communication with lower delay can be realized in the license-exempt transmission.

<2. configuration example of each apparatus >

<2.1. configuration example of base station apparatus >

Fig. 6 is a block diagram showing a configuration example of the base station apparatus 100 according to the present embodiment. Referring to fig. 6, the base station apparatus 100 includes an antenna unit 110, a wireless communication unit 120, a network communication unit 130, a storage unit 140, and a control unit 150.

(1) Antenna unit 110

The antenna unit 110 transmits the signal output by the wireless communication unit 120 into a space as a radio wave. Further, the antenna unit 110 converts radio waves in the space into a signal and outputs the signal to the wireless communication unit 120.

(2) Wireless communication unit 120

The wireless communication unit 120 transmits and receives signals. For example, the wireless communication unit 120 transmits a downlink signal to the terminal apparatus and receives an uplink signal from the terminal apparatus.

(3) Network communication unit 130

The network communication unit 130 transmits and receives information. For example, the network communication unit 130 transmits and receives information to and from other nodes. The other nodes include, for example, another base station and another core network node.

(4) Memory cell 140

The storage unit 140 temporarily or permanently stores programs and various types of data for the operation of the base station apparatus 100.

(5) Control unit 150

The control unit 150 controls the operation of the entire base station apparatus 100 to provide various functions of the base station apparatus 100. The control unit 150 includes a setting unit 151 and a communication processing unit 153.

The setting unit 151 has a function of statically or quasi-statically setting the terminal device. In particular, with respect to the URLLC terminal 200, the setting unit 151 transmits setting information on the resource available for unlicensed transmission to allocate the resource available for unlicensed transmission to the URLLC terminal 200. Further, the setting information may further include scrambling information described later, a bit position in the common control channel corresponding to the specific URLLC terminal 200, a notification period of the unlicensed transmission parameter information, an application period of the unlicensed transmission parameter information, and the like. The setting unit 151 transmits setting information including these pieces of information to the URLLC terminal 200 to perform setting of the URLLC terminal 200. The static or quasi-static setting by the setting unit 151 may be performed by, for example, RRC signaling.

The communication processing unit 153 has a function of dynamically controlling the terminal apparatus to communicate with the terminal apparatus. In particular, regarding the URLLC terminal 200, the communication processing unit 153 transmits authorization-exempt transmission parameter information described later to the URLLC terminal 200 to communicate with the URLLC terminal 200 based on the authorization-exempt transmission parameter information. More specifically, the base station apparatus 100 receives URLLC data transmitted by the URLLC terminal 200 based on the unlicensed transmission parameter information. With respect to the eMBB terminal 300, the communication processing unit 153 transmits grant-based transmission parameter information, which will be described later, to the eMBB terminal 300 to communicate with the eMBB terminal 300 according to the grant-based transmission parameter information. More specifically, the base station apparatus 100 receives the eMBB data transmitted by the eMBB terminal 300 according to the grant-based transmission parameter information. Note that the parameter information is dynamically transmitted and is transmitted through, for example, a control channel.

The control unit 150 may further include constituent elements other than these constituent elements. That is, the control unit 150 may also perform operations other than those of the constituent elements.

<2.2. example of configuration of URLLC terminal >

Fig. 7 is a block diagram showing a configuration example of the URLLC terminal 200 according to the present embodiment. Referring to fig. 7, the URLLC terminal 200 includes an antenna unit 210, a wireless communication unit 220, a storage unit 230, and a control unit 240.

(1) Antenna unit 210

The antenna unit 210 transmits a signal output by the wireless communication unit 220 into a space as a radio wave. Further, the antenna unit 210 converts radio waves in the space into a signal, and outputs the signal to the wireless communication unit 220.

(2) Wireless communication unit 220

The wireless communication unit 220 transmits and receives signals. For example, the wireless communication unit 220 receives a downlink signal from a base station and transmits an uplink signal to the base station.

(3) Memory cell 230

The storage unit 230 temporarily or permanently stores programs and various types of data for the operation of the URLLC terminal 200.

(4) Control unit 240

The control unit 240 controls the operation of the entire URLLC terminal 200 to provide various functions of the URLLC terminal 200. The control unit 240 includes a setting unit 241 and a communication processing unit 243.

The setting unit 241 has a function of accepting static or quasi-static setting from the base station apparatus 100. More specifically, the setting unit 241 makes a setting regarding the resource available for unlicensed transmission based on the setting information received from the base station apparatus 100. Further, the setting information may further include scrambling information described later, a bit position in the common control channel corresponding to the specific URLLC terminal 200, a notification period of the unlicensed transmission parameter information, an application period of the unlicensed transmission parameter information, and the like. The setting unit 241 may also perform setting based on the received setting information.

The communication processing unit 243 has a function of performing communication with the base station apparatus 100 based on dynamic control of the base station apparatus 100. More specifically, the communication processing unit 243 communicates with the base station apparatus 100 based on the later-described unlicensed transmission parameter information received from the base station apparatus 100.

The control unit 240 may further include constituent elements other than these constituent elements. That is, the control unit 240 may perform operations other than those of the constituent elements.

<3. technical characteristics >

Hereinafter, technical features of the present embodiment will be described.

Note that, hereinafter, "provision" means that a specification is defined in a standard. Further, "set" means a quasi-static instruction by RRC signaling or the like or a dynamic instruction by a control channel or the like.

<3.1. dynamic resource sharing >

URLLC terminal 200 makes the unlicensed transmission, and the resources available for unlicensed transmission may include resources that are not actually used for transmission. Therefore, in a case where the URLLC terminal 200 occupies a resource allocated to the URLLC terminal 200 as an available resource for the unlicensed transmission, a resource not used by the URLLC terminal 200 is wasted. As a result, the use efficiency of the uplink resources is reduced.

Thus, the system 1 according to the present embodiment performs dynamic resource sharing of the available grant-free transmission resources and grant-based transmission resources. Specifically, the eMBB data is transmitted by using orthogonal resources (frequency and time) that are at least partially the same as the resources available for unlicensed transmission. In other words, the base station apparatus 100 allocates at least a part of the license exempt transmission available resources as license based transmission resources to the eMBB terminal 300. In this way, resources that are not actually used for transmission of the unlicensed transmission available resources are used for transmission of the eMBB data, and the use efficiency of the uplink resources can be improved. This will be described with reference to fig. 8.

Fig. 8 is a diagram for describing an example of dynamic resource sharing according to the present embodiment. The vertical axis of fig. 8 indicates frequency, and the horizontal axis indicates time. As shown in fig. 8, the base station apparatus 100 allocates an available resource 50 for unlicensed transmission to the URLLC terminal 200. The URLLC terminal 200 selects an uplink resource to be used from the allocated grant-less transmission available resources 50, and performs uplink transmission of URLLC data using the selected uplink resource. On the other hand, the URLLC terminal 200 does not use uplink resources that are not selected from the allocated grant-free transmission available resources 50. In the example shown in fig. 8, the unused resource 51 is a resource that is not used for transmission of URLLC data, and the used resource 52 is a resource that is used for transmission of URLLC data.

As shown in fig. 8, the base station apparatus 100 allocates grant-based transmission resources 60 as uplink resources including the grant-exempt transmission available resources 50 to the eMBB terminal 300. That is, the base station apparatus 100 allocates the grant-exempt transmission available resource 50 and the grant-based transmission resource 60 together (overlapping). The eMBB terminal 300 typically uses the entire grant-based transmission resource 60, i.e., also uses the unused resource 51, for uplink transmission of eMBB data. Unused resources 51 that are not used for transmission of URLLC data are used for transmission of eMBB data, and the use efficiency of uplink resources can be improved. In addition, the flexibility of scheduling in uplink resources may be increased.

Note that the grant-exempt transmission available resources 50 include unit resources including, for example, predetermined frequency resources (such as subcarriers and resource blocks) and predetermined time resources (such as symbols and URLLC frames). In the example shown in fig. 8, the unlicensed transmission available resource 50 includes one unit resource in the frequency direction and seven unit resources in the time direction in a predetermined eMBB frame. The present technology is not limited to this example, and may include two or more unit resources in the frequency direction, for example. Further, the present technology may include, for example, almost permanent unit resources in the time direction.

In the used resources 52 of the grant-free transmission available resources 50, uplink transmission of both URLLC data and eMBB data is performed. Therefore, there may be interference between URLLC data and eMBB data. The eMBB data may not always be transmitted by using all uplink resources. This will be described with reference to fig. 9.

fig. 9 is a diagram for describing an example of dynamic resource sharing according to the present embodiment. The vertical axis of fig. 9 indicates frequency, and the horizontal axis indicates time. As shown in fig. 9, the available resources 50A for unlicensed transmission do not overlap with the grant-based transmission resources. On the other hand, the grant-free transmission available resources 50B overlap with the grant-based transmission resources 60. Therefore, the eMBB data does not cause interference in URLLC data transmitted by using the used resource 52A. On the other hand, the eMBB data causes interference in URLLC data transmitted by using the already used resource 52B.

The transmission quality of URLLC data varies depending on whether there is interference caused by eMBB data. Therefore, the optimum value of parameter information (hereinafter, also referred to as unlicensed transmission parameter information) for transmitting URLLC data varies depending on whether or not interference is present. However, in typical unlicensed transmissions, the unlicensed transmission parameter information is quasi-statically set through RRC signaling along with the resources available for unlicensed transmission. Therefore, although the presence or absence of interference may vary between eMBB frames, the unlicensed transmission parameter information does not vary depending on the presence or absence of interference. As a result, the transmission efficiency of URLLC data deteriorates.

Accordingly, the base station apparatus 100 dynamically switches the unlicensed transmission parameter information according to whether or not there is interference (i.e., according to whether or not there is an overlap of the unlicensed transmission available resources and the grant-based transmission resources). More specifically, the base station apparatus 100 first communicates with the eMBB terminal 300 (e.g., receives a resource allocation request from the eMBB terminal 300) to obtain timing at which interference may occur (i.e., timing of uplink transmission of eMBB data). In addition, the base station apparatus 100 sets first grant-less transmission parameter information suitable for the case of no interference in a period of no interference, and sets second grant-less transmission parameter information suitable for the case of interference in a period of interference.

Although there are two pieces of information including the first and second unlicensed transmission parameter information in the description of the present specification, the present technology is not limited to this example. For example, there may be three or more pieces of unlicensed transmission parameter information. For example, the unlicensed transmission parameter information may be switched according to the magnitude of interference between three or more pieces of unlicensed transmission parameter information. Furthermore, the adaptive control of the grant-free transmission parameter information is not limited to adaptive control based on the interference magnitude. Adaptive control may also be performed based on various factors such as scheduling of the base station apparatus 100 and other terminal apparatuses.

The base station apparatus 100 uses, for example, a downlink control channel for transmission of a predetermined period to notify the license exemption transmission parameter information. The URLLC terminal 200 applies the unlicensed transmission parameter information notified through the predetermined downlink control channel to the predetermined unlicensed transmission available resources. Among the resources available for the unlicensed transmission to be applied, the URLLC terminal 200 uses the notified unlicensed transmission parameter information for the unlicensed transmission. This will be described with reference to fig. 10 and 11.

Fig. 10 is a diagram for describing the setting processing of the license exempt transmission parameter information according to the present embodiment. As shown in fig. 10, the base station apparatus 100 notifies the unlicensed transmission parameter information # n to be applied to the uplink (PUSCH) of the eMBB frame # n through the downlink control channel (PDCCH) of the eMBB frame # n-1. In this case, the base station apparatus 100 notifies the first or second unlicensed transmission parameter information as the unlicensed transmission parameter information # n according to whether or not the eMBB data is to be transmitted in the eMBB frame # n. In addition, the URLLC terminal 200 performs the unlicensed transmission in the uplink of the eMBB frame # n using the unlicensed transmission parameter information # n notified via the downlink control channel of the eMBB frame # n-1. Such a process allows the URLLC terminal 200 to make the best grant-free transmission depending on whether or not there is interference. This is similar for frames other than the eMBB frame # n.

Fig. 11 is a sequence diagram for describing an example of the flow of the setting process of the license exempt transmission parameter information according to the present embodiment. The present sequence relates to the base station apparatus 100 and the URLLC terminal 200. As shown in fig. 11, the base station apparatus 100 first performs setting for the unlicensed transmission in the URLLC terminal 200 using RRC signaling (step S102). The settings for the unlicensed transmission here comprise at least information indicating an allocation of resources available for the unlicensed transmission. Next, the base station apparatus 100 notifies the URLLC terminal 200 of the unlicensed transmission parameter information (step S104). Next, the URLLC terminal 200 performs the unlicensed transmission of the uplink data using the notified unlicensed transmission parameter information (steps S106 and S108). The subsequent processing (steps S110 to S114) is a repetition of steps S104 to S108.

Although the dynamic resource sharing has been described above with respect to one base station apparatus 100 and the URLLC terminal 200 and the eMBB terminal 300 in the coverage of the base station apparatus 100 as shown in fig. 1, the present technology is not limited to this example. For example, dynamic resource sharing may be performed with respect to a plurality of neighboring base station apparatuses 100 and URLLC terminals 200 and eMBB terminals 300 at the cell edge of the base station apparatus 100. Specifically, the unlicensed transmission parameter information to be applied to the URLLC terminal 200 can be dynamically switched depending on whether or not there is interference between the URLLC terminal 200 and the eMBB terminal 300 that communicate with different base station apparatuses 100.

<3.2. parameter information >

The parameter information may be parameter information such as an absolute value that can be used alone, or may be information such as a relative value that can be used in relation to reference information. In the latter case, the parameter information is information indicating a difference from reference information (e.g., a prescribed value, a value set through RRC signaling, or a latest value).

<3.2.1. authorization-free Transmission parameter information >

The unlicensed transmission parameter information is used for uplink data for unlicensed transmission. The base station apparatus 100 generates the unlicensed transmission parameter information and transmits the unlicensed transmission parameter information to the URLLC terminal 200. The URLLC terminal 200 generates URLLC data based on the received unlicensed transmission parameter information, and transmits the URLLC data to the base station apparatus 100.

The base station apparatus 100 sets different grant-less transmission parameter information according to whether there is interference (i.e., according to whether there is overlap of the grant-less transmission available resources and the grant-based transmission resources). More simply, the unlicensed transmission parameter information is determined based on whether there is eMBB data. For example, in the absence of interference, that is, in the absence of overlap of the grant-exempt transmission available resources and the grant-based transmission resources, the base station apparatus 100 sets the first grant-exempt transmission parameter information in the URLLC terminal 200. On the other hand, in the presence of interference, that is, in the presence of overlap of the grant-exempt transmission available resource and the grant-based transmission resource, the base station apparatus 100 sets the second grant-exempt transmission parameter information in the URLLC terminal 200.

The license exempt transmission information is one of the information described below, or information including a combination of these pieces of information.

(1) Modulation scheme and/or coding rate

The unlicensed transmission parameter information may be information on a modulation scheme and/or a coding rate of uplink data for unlicensed transmission.

For example, the first unlicensed transmission parameter information indicates a modulation scheme and/or a coding rate having relatively high usage efficiency (i.e., a modulation scheme of a high modulation order and/or a high coding rate). The second unlicensed transmission parameter information indicates a modulation scheme and/or a coding rate having relatively low usage efficiency (i.e., a modulation scheme of a low modulation order and/or a low coding rate).

As a result of the handover, the first unlicensed transmission parameter information allows transmission with high transmission efficiency in the absence of interference. In the presence of interference, the second unlicensed transmission parameter information allows for transmissions with high interference immunity.

(2) Transmission power

The unlicensed transmission parameter information may be information on transmission power of uplink data for unlicensed transmission.

For example, the first unlicensed transmission parameter information indicates a relatively low transmission power. The second unlicensed transmission parameter information indicates a relatively high transmission power.

As a result of the handover, the first unlicensed transmission parameter information reduces unnecessary transmission power in the absence of interference, and power consumption of the terminal can be reduced. In the presence of interference, the second unlicensed transmission parameter information allows for transmissions with high interference immunity.

(3) Number of layers (number of spatial multiplexing signals)

The unlicensed transmission parameter information may be information on the number of layers (the number of spatial multiplexing signals, the number of MIMO signals) of uplink data for unlicensed transmission.

For example, the first unlicensed transmission parameter information indicates a relatively large number of layers, and the second unlicensed transmission parameter information indicates a relatively small number of layers. Further, for example, the first parameter indicates the number of layers is one or more, and the second transmission parameter indicates the number of layers is only one.

(4) Transmission method for spatial domain

The unlicensed transmission parameter information may be information on a transmission method of a spatial domain with respect to uplink data for unlicensed transmission. Transmission methods with respect to the spatial domain include MIMO (multiple input multiple output) transmission and transmission diversity such as SFBC (space frequency block coding).

For example, the first unlicensed transmission parameter information indicates a transmission method that allows transmission with relatively high usage efficiency, and the second unlicensed transmission parameter information indicates a transmission method that allows transmission with relatively low usage efficiency. Here, the transmission method with relatively high use efficiency is, for example, MIMO transmission for spatial multiplexing of a plurality of pieces of data, and the transmission method with relatively low use efficiency is, for example, transmission diversity for spatial multiplexing of one piece of data.

(5) Transmission method for non-orthogonal domain

The unlicensed transmission parameter information may be information on a transmission method of a non-orthogonal domain with respect to uplink data for unlicensed transmission. For example, the unlicensed transmission parameter information may be information indicating one of user multiplexing schemes (multiple access schemes) using non-orthogonal resources. The unlicensed transmission parameter information may be information indicating whether or not there is a user multiplexing scheme using non-orthogonal resources. That is, the unlicensed transmission parameter information related to the transmission method regarding the non-orthogonal domain may be information indicating a transmission method using non-orthogonal resources or may be information indicating a transmission method not using non-orthogonal resources (i.e., a transmission method using only orthogonal resources).

For example, the first unlicensed transmission parameter information indicates transmission using a non-orthogonal resource pattern with relatively high usage efficiency, and the second unlicensed transmission parameter information indicates transmission using a non-orthogonal resource pattern with relatively low usage efficiency. Further, for example, the first unlicensed transmission parameter information indicates a transmission method that does not use non-orthogonal resources (a transmission method that uses only orthogonal resources), and the second unlicensed transmission parameter information indicates a transmission method that uses non-orthogonal resources.

As a result of the handover, the first parameter allows transmission with high transmission efficiency in the absence of interference. In the presence of interference, the second parameter allows for transmissions with high interference immunity.

(6) Signal waveform

The unlicensed transmission parameter information may be information on a signal waveform of uplink data for unlicensed transmission. Examples of the signal waveform include the CP-OFDM signal and the DFT-s-OFDM signal as described above.

For example, the first unlicensed transmission parameter information indicates a signal waveform having a relatively high PAPR. The second unlicensed transmission parameter information indicates a signal waveform having a relatively low PAPR. Here, the signal waveform having a relatively high PAPR is, for example, a CP-OFDM signal, and the signal waveform having a relatively low PAPR is, for example, a DFT-s-OFDM signal.

As a result of the handover, the first unlicensed transmission parameter information allows transmission with high transmission efficiency despite high PAPR in the absence of interference. In the presence of interference, the second unlicensed transmission parameter information may reduce PAPR and allow transmission with high interference immunity.

(7) Time slot length

The unlicensed transmission parameter information may be information on a slot length of uplink data for unlicensed transmission. As described above, the slot length may be specified or set by the number of symbols and/or the time length of one symbol (i.e., subcarrier spacing). Furthermore, the slot length may be specified or set by a set (aggregation) of one or more URLLC slots.

For example, the first unlicensed transmission parameter information indicates a relatively short slot length. The second unlicensed transmission parameter information indicates a relatively long slot length.

As a result of the handover, the first unlicensed transmission parameter information may reduce the time for data transmission and allow transmission with high transmission efficiency in the absence of interference. In the presence of interference, the second unlicensed transmission parameter information may increase the resources for data transmission and allow for transmissions with high interference immunity.

(8) Number of repetitions of data transmission

The unlicensed transmission parameter information may be information on the number of repetitions of transmission of the uplink data for unlicensed transmission. The repetition of data transmission means that the same data is transmitted multiple times using different physical resources. This increases the reliability of the data.

For example, the first unlicensed transmission parameter information indicates a relatively small number of repetitions, and the second unlicensed transmission parameter information indicates a relatively large number of repetitions. Further, for example, the first license-exempt transmission parameter information indicates a transmission in which data transmission is not repeated, and the second transmission parameter indicates a transmission in which data transmission is repeated one or more times.

As a result of the handover, the first unlicensed transmission parameter information may reduce unnecessary data transmission and allow transmission with high transmission efficiency in the absence of interference. The second unlicensed transmission parameter information may improve the reliability of data in the presence of interference and allow for transmission with high interference immunity.

(9) Beam pattern

The unlicensed transmission parameter information may be information on a beam pattern (i.e., a precoding pattern) of uplink data for unlicensed transmission. The beam pattern is a pattern with respect to the direction of the beam and the size (sharpness) of the beam.

For example, the first unlicensed transmission parameter information indicates a beam direction with respect to the base station apparatus 100 having relatively high transmission efficiency. The second unlicensed transmission parameter information indicates a beam direction with respect to the base station apparatus 100 with relatively little interference.

As a result of the handover, the first unlicensed transmission parameter information allows transmission with high transmission efficiency in the absence of interference. In the presence of interference, the second unlicensed transmission parameter information allows for transmissions with less interference.

<3.2.2. authorization-based Transmission parameter information >

The grant based transmission parameter information is for grant based transmitted uplink data. The base station apparatus 100 generates the grant-based transmission parameter information and transmits the grant-based transmission parameter information to the eMBB terminal 300. The eMBB terminal 300 generates eMBB data based on the received grant-based transmission parameter information, and transmits the eMBB data to the base station apparatus 100.

As in the grant-free transmission parameter information, the grant-based transmission parameter information may include information regarding at least one of: modulation scheme, coding rate, transmission power, the number of layers (the number of spatially multiplexed signals), a transmission method with respect to a spatial domain, a transmission method with respect to a non-orthogonal domain, a signal waveform, a slot length, the number of repetitions of data transmission, or a beam pattern.

However, unlike in the license-exempt transmission parameter information, the setting value of the license-based transmission parameter information is not switched depending on whether or not there is interference. This is because the base station apparatus 100 cannot recognize whether or not the URLLC terminal 200 performing the unlicensed transmission actually uses the allocated resource for transmission.

In addition, the grant-based transmission parameter information includes information on resources (time, frequency, and/or coding) used for uplink transmission. It should be noted that the information on the resources for uplink transmission is statically or quasi-statically set with respect to the grant-less transmission, and the grant-less transmission parameter information does not include information on the resources for uplink transmission.

<3.3. Notification method of authorization-free transmission parameter information >

The base station apparatus 100 transmits the unlicensed transmission parameter information to the URLLC terminal 200 using the control channel to notify the unlicensed transmission parameter information. There may be various notification methods. For example, the notification method is classified into an explicit notification method and an implicit notification method.

(1) Explicit notification method

The explicit notification method is a method of directly notifying the unlicensed transmission parameter information.

The base station apparatus 100 can notify the unlicensed transmission parameter information using a downlink control channel in the physical layer. The control channel for notifying the unlicensed transmission parameter information is one of the following.

Control channel specific to the terminal

The terminal specific control channel is a control channel for transmissions to the individual URLLC terminal 200. The base station apparatus 100 transmits control information including the license-exempt transmission parameter information to be set by the URLLC terminal 200 through a control channel for transmission to the individual URLLC terminal 200. In the case of using a control channel specific to the terminal, individual unlicensed transmission parameter information for the URLLC terminal 200 can be notified, and the base station apparatus 100 can set the details.

Error correction coding is applied to the terminal-specific control channel, and redundant bits obtained by the error correction coding are scrambled and generated by scrambling information (e.g., scrambling ID) specific to the URLLC terminal 200. Accordingly, the URLLC terminal 200 can identify a control channel including control information destined for the URLLC terminal 200.

Scrambling information may be set separately for unlicensed transmissions. In this case, the URLLC terminal 200 is notified of scrambling information through RRC signaling.

Control channel common to multiple terminals

The control channel common to multiple terminals is a control channel for transmissions to multiple URLLC terminals 200. The base station apparatus 100 transmits control information including the license exempt transmission parameter information to be set by the plurality of URLLC terminals 200 through a control channel for transmission to the plurality of URLLC terminals 200.

The control information may be information including multiplexed unlicensed transmission parameter information for a plurality of URLLC terminals 200. For example, in the case where the unlicensed transmission parameter information for one URLLC terminal 200 is 2 bits, 20 bits of control information may be transmitted through a control channel common to ten URLLC terminals 200. In this case, information (e.g., bit positions) for specifying the unlicensed transmission parameter information corresponding to each URLLC terminal 200 among the plurality of pieces of multiplexed unlicensed transmission parameter information may be set in advance for each URLLC terminal 200. This setting is done, for example, by RRC signaling. Each URLLC terminal 200 acquires the license-exempt transmission parameter information destined for the URLLC terminal 200 based on the setting.

The control information may include unlicensed transmission parameter information common to multiple URLLC terminals 200. In this case, overhead for notifying the license-exempt transmission parameter information can be suppressed.

Error correction coding is applied to a control channel common to a plurality of terminals, and redundant bits obtained by the error correction coding are scrambled and generated by scrambling information common to a plurality of target URLLC terminals 200. Thus, each of the plurality of target URLLC terminals 200 can identify a control channel that includes control information to a plurality of URLLC terminals 200 including the URLLC terminal 200.

(2) Implicit notification method

The implicit notification method is a method of indirectly notifying the unlicensed transmission parameter information in association with other information.

For example, the unlicensed transmission parameter information is notified in association with the slot format information.

The slot format information is information notified for each of one or more slots, and is information indicating a format (slot configuration) in a slot of an uplink, a downlink, or the like. As described above, the slot format information is information indicating that a slot is used for uplink-only transmission, downlink-only transmission, a combination of downlink transmission and uplink transmission, a blank, and the like. The slot format information is informed over a frequency carrier, for example, using Time Division Duplexing (TDD).

For example, in the case where the slot format information is the first format, the URLLC terminal 200 uses the first unlicensed transmission parameter information as the unlicensed transmission parameter information. On the other hand, in the case where the slot format information is in the second format, the URLLC terminal 200 uses the second unlicensed transmission parameter information as the unlicensed transmission parameter information. Specifically, the first format may be a format that allows transmission only by the URLLC terminal 200, and the second format may be a format that allows transmission by both the URLLC terminal 200 and the eMBB terminal 300.

(3) Notification timing

The base station apparatus 100 notifies the downlink control channel including the unlicensed transmission parameter information through a predetermined time slot (equivalent to the first time slot).

Periodic notification

The base station apparatus 100 may periodically notify the unlicensed transmission parameter information. In this case, the URLLC terminal 200 receives the downlink control channel including the grant-exempt transmission parameter information at a predetermined cycle.

The notification period for the unlicensed parameters may be determined based on a transmission time interval of the eMBB data. In other words, a time slot for transmitting a downlink control channel including the grant-less transmission parameter information may be determined based on a transmission time interval of the eMBB data. For example, the notification period of the unlicensed transmission parameters may be the same length as the eMBB slot or the same length as an integer multiple of the eMBB slot. That is, the notification period of the unlicensed transmission parameters may be the same length as an integer multiple of seven or fourteen symbols. In this case, the base station apparatus 100 may perform adaptive control of the grant-less transmission parameter information based on the eMBB slot length.

The notification period of the unlicensed transmission parameter information may be based on a length of one millisecond (equivalent to a subframe length).

The notification period of the unlicensed transmission parameter information may be based on a length of ten milliseconds (equivalent to one radio frame length).

The notification period of the unlicensed transmission parameter information may be specified, or may be set through RRC signaling.

Aperiodic notification

The base station apparatus 100 periodically notifies the unlicensed transmission parameter information. In this case, the URLLC terminal 200 monitors (i.e., blindly detects) the downlink control channel, which may include the grant-free transmission parameter information.

The slot for transmitting the downlink control channel including the grant-less transmission parameter information may be determined according to a period (i.e., a notification period) determined based on a transmission time interval of the eMBB data. More specifically, the base station apparatus 100 transmits a downlink control channel including the unlicensed transmission parameter information at the timing of changing the unlicensed transmission parameter information in the notification period. Examples of the timing of changing the unlicensed transmission parameter information include a timing at which the presence or absence of overlap in resources of URLLC data and eMBB data is changed, a timing at which the content of eMBB data is changed, and a timing at which the interfering-party eMBB terminal 300 is changed. Each time in the notification period, the URLLC terminal 200 monitors (i.e., receives) a slot (i.e., the first slot) in which the downlink control channel including the grant-less transmission parameter information can be transmitted. In a case where the URLLC terminal 200 detects the unlicensed transmission parameter information as a result of the monitoring, the URLLC terminal 200 uses the detected unlicensed transmission parameter information for unlicensed transmission from then on. On the other hand, in a case where the URLLC terminal 200 does not detect the unlicensed transmission parameter information as a result of the monitoring, the URLLC terminal 200 performs unlicensed transmission using predetermined unlicensed transmission parameter information. Specifically, the URLLC terminal 200 continuously uses the latest unlicensed transmission parameter information, and performs unlicensed transmission using prescribed unlicensed transmission parameter information or unlicensed transmission parameter information set specifically for the base station apparatus 100 or set specifically for the URLLC terminal 200. Note that the license-exempt transmission parameter information specific to the base station apparatus 100 or specific to the URLLC terminal 200 may be set through RRC signaling.

(4) Transmission parameter information notification method based on authorization

The notification method based on the authorized transmission parameter information is similar to the notification method of the unauthorized transmission parameter information.

<3.4. application period of unlicensed transmission parameter information >

When the URLLC terminal 200 receives the unlicensed transmission parameter information on the unlicensed transmission, the URLLC terminal 200 applies the received unlicensed transmission parameter information for transmission.

The correspondence between the URLLC slot (corresponding to the first slot) in which the unlicensed transmission parameter information has been received and the URLLC slot in which transmission based on the unlicensed transmission parameter information is applied is specified or set by RRC signaling. The URLLC slots to which transmission based on the received unlicensed transmission parameter information is applied are URLLC slots in a period comprising a predetermined number of consecutive URLLC slots. This period will also be referred to as an application period of the unlicensed transmission parameter information.

The application period for the unlicensed transmission parameter information may be determined based on a transmission time interval of the eMBB data. For example, the application period of the unlicensed transmission parameter information may be the same length as the eMBB slot, or may be the same length as an integer multiple of the eMBB slot. That is, the application period of the unlicensed transmission parameter information may be the same length as an integer multiple of seven or fourteen symbols. In this case, the base station apparatus 100 may perform adaptive control of the grant-less transmission parameter information based on the eMBB slot length.

The application period of the unlicensed transmission parameter information may be based on a length of one millisecond (equivalent to one subframe length).

The application period of the unlicensed transmission parameter information may be based on a length of ten milliseconds (equivalent to one radio frame length).

The preamble slot (corresponding to the second slot) in the application period of the unlicensed transmission parameter information may be defined or may be set through RRC signaling.

Here, the relationship (i.e., time difference) between the slot in which the unlicensed transmission parameter information has been received and the preamble slot in the application period of the unlicensed transmission parameter information may be set specifically for the URLLC terminal 200. This is because the processing time from the reception of the control channel by the URLLC terminal 200 to the time when transmission using the unlicensed transmission parameter information becomes possible after the detection of the unlicensed transmission parameter information varies depending on the capability of the URLLC terminal 200. Therefore, the relationship between the URLLC slot in which the unlicensed transmission parameter information has been received and the preamble slot in the application period of the unlicensed transmission parameter information can be set according to the terminal capability information of the URLLC terminal 200. In this way, even in the case where the processing time varies among a plurality of URLLC terminals 200, each URLLC terminal 200 can quickly apply the unlicensed transmission parameter information while maintaining the processing time. The terminal capability information is, for example, information indicating calculation capability, storage capability, remaining battery, and the like, and is also referred to as capability information.

The URLLC terminal 200 transmits to the base station apparatus 100 terminal capability information on a time difference between the slot in which the unlicensed transmission parameter information has been received and the preamble slot in the application period of the unlicensed transmission parameter information. In this way, the base station apparatus 100 can set the time difference between the slot in which the unlicensed transmission parameter information has been received and the preamble slot of the application period of the unlicensed transmission parameter information exclusively for the URLLC terminal 200.

The application period of the unlicensed transmission parameter information may be assumed as a notification period of the unlicensed transmission parameter information. That is, the URLLC terminal 200 receives the unlicensed transmission parameter information notified in a predetermined slot or symbol in the application period of the unlicensed transmission parameter information. More specifically, the URLLC terminal 200 monitors a downlink control channel including the unlicensed transmission parameter information mapped on a predetermined slot or symbol in the application period of the unlicensed transmission parameter information.

<3.5. modification >

In the above description, although the unlicensed transmission parameter information is switched on the assumption that one resource available for unlicensed transmission is provided in a predetermined unit time, the present technology is not limited to this example. For example, the unlicensed transmission parameter information may include information indicating physical resources (such as time resources, frequency resources, and/or coding resources) for the uplink data for unlicensed transmission. The physical resource may be a resource available for unlicensed transmission or may be a resource to be used among the allocated resources available for unlicensed transmission. For example, two or more unlicensed transmission available resources may be provided (set) to the URLLC terminal 200 at a predetermined unit time, and the URLLC terminal 200 may notify one unlicensed transmission available resource to be used among the unlicensed transmission available resources in which the unlicensed transmission parameter information is set.

For example, the first unlicensed transmission parameter information indicates the first resource. The second unlicensed transmission parameter information indicates a second resource.

Here, the first and second unlicensed transmission parameter information may not depend on whether there is interference caused by the eMBB data. That is, the first and second unlicensed transmission parameter information may be used to inform physical resources free of interference (or having low interference) caused by the eMBB data. In this case, the URLLC terminal 200 may transmit URLLC data using resources with no interference caused by the eMBB data or with low interference caused by the eMBB data.

<4. application example >

Hereinafter, application examples of the technique according to the present disclosure will be described. Note that in this specification, eNB (evolved node B) is also referred to as a gNB.

The techniques according to the present disclosure may be applied to a variety of products. For example, the base station apparatus 100 may be implemented as one of various types of enbs (evolved node bs), such as a macro eNB and a small eNB. The small eNB may be an eNB that covers a smaller cell than a macro cell, such as a pico eNB, a micro eNB, and a home (femto) eNB. Instead, the base station apparatus 100 may be implemented as another type of base station, such as a node B and a BTS (base transceiver station). The base station apparatus 100 may include a main body (also referred to as a base station apparatus) that controls wireless communication, and one or more RRHs (remote radio heads) arranged at a different location from the main body. Further, various types of terminals discussed later may temporarily or almost permanently perform a base station function to operate as the base station apparatus 100.

Further, for example, the terminal devices 200 and 300 may be implemented as mobile terminals such as smart phones, tablet PCs (personal computers), notebook PCs, portable game terminals, portable/adaptor-type mobile routers, and digital cameras, or as in-vehicle terminals such as car navigation devices. Further, the terminal devices 200 and 300 may be implemented as terminals (also referred to as MTC (machine type communication) terminals) that perform M2M (machine to machine) communication. In addition, the terminal apparatuses 200 and 300 may be wireless communication modules (e.g., integrated circuit modules including one die) mounted on these terminals.

<4.1. application example to base station apparatus >

(first application example)

Fig. 12 is a block diagram illustrating a first example of a schematic configuration of an eNB to which techniques according to the present disclosure may be applied. eNB800 includes one or more antennas 810 and a base station apparatus 820. Each of the antennas 810 and the base station apparatus 820 may be connected to each other through an RF cable.

Each of the antennas 810 includes a single antenna element or a plurality of antenna elements (e.g., a plurality of antenna elements included in a MIMO antenna), and the antennas 810 are used for wireless signals transmitted and received by the base station apparatus 820. As shown in fig. 12, eNB800 includes multiple antennas 810, and the multiple antennas 810 may, for example, correspond to multiple frequency bands used by eNB 800. Note that although the eNB800 includes multiple antennas 810 in the example shown in fig. 12, the eNB800 may include a single antenna 810.

The base station apparatus 820 includes a controller 821, a memory 822, a network interface 823, and a wireless communication interface 825.

The controller 821 may be, for example, a CPU or a DSP, and the controller 821 operates various functions of upper layers of the base station apparatus 820. For example, the controller 821 generates a data packet from data in a signal processed by the wireless communication interface 825 and transfers the generated packet through the network interface 823. The controller 821 may bundle data from a plurality of baseband processors to generate a binding packet, and deliver the generated binding packet. Further, the controller 821 may have logical functions for performing control such as radio resource control, radio bearer control, mobility management, admission control, and scheduling. Further, the control may be performed in cooperation with surrounding enbs or core networks. The memory 822 includes a RAM and a ROM, and stores programs executed by the controller 821 and various types of control data (e.g., a terminal list, transmission power data, scheduling data, etc.).

The network interface 823 is a communication interface for connecting the base station apparatus 820 to a core network 824. The controller 821 may communicate with a core network node or another eNB through a network interface 823. In that case, the eNB800 and the core network node or other enbs may be connected to each other through a logical interface (e.g., an S1 interface or an X2 interface). The network interface 823 may be a wired communication interface or a wireless communication interface for wireless backhaul. In the case where the network interface 823 is a wireless communication interface, the network interface 823 may use a higher frequency band in wireless communication than the frequency band used by the wireless communication interface 825.

The wireless communication interface 825 supports a cellular communication manner such as LTE (long term evolution) or LTE-advanced, and provides wireless connection to terminals located in a cell of the eNB800 through the antenna 810. The wireless communication interface 825 may generally include a baseband (BB) processor 826, RF circuitry 827, and the like. The BB processor 826 may perform, for example, encoding/decoding, modulation/demodulation, multiplexing/demultiplexing, and the like, and the BB processor 826 performs various types of signal processing of each layer (e.g., L1, MAC (medium access control), RLC (radio link control), and PDCP (packet data convergence protocol)). The BB processor 826 may include part or all of the logic functions in place of the controller 821. The BB processor 826 may be a module including a memory storing a communication control program, a processor executing the program, and a related circuit, and the function of the BB processor 826 may be changed by updating the program. Further, the module may be a card or a blade inserted into a slot of the base station apparatus 820, or may be a chip mounted on the card or the blade. On the other hand, the RF circuit 827 may include a mixer, a filter, an amplifier, and the like, and the RF circuit 827 transmits and receives a wireless signal through the antenna 810.

As shown in fig. 12, the wireless communication interface 825 includes a plurality of BB processors 826, and the plurality of BB processors 826 may correspond to a plurality of frequency bands used by the eNB800, for example. Further, as shown in fig. 12, the wireless communication interface 825 includes a plurality of RF circuits 827, and the plurality of RF circuits 827 may correspond to a plurality of antenna elements, for example. Note that although the wireless communication interface 825 includes a plurality of BB processors 826 and a plurality of RF circuits 827 in the example shown in fig. 12, the wireless communication interface 825 may include a single BB processor 826 or a single RF circuit 827.

In the eNB800 shown in fig. 12, one or more constituent elements (the setting unit 151 and/or the communication processing unit 153) included in the base station apparatus 100 described with reference to fig. 6 may be implemented in the wireless communication interface 825. Alternatively, at least a part of the constituent elements may be implemented in the controller 821. For example, a module including a part (e.g., the BB processor 826) or all of the wireless communication interface 825 and/or the controller 821 may be installed on the eNB800, and one or more constituent elements may be implemented in the module. In this case, the module may store a program for causing the processor to function as one or more constituent elements (in other words, a program for causing the processor to execute the operation of one or more constituent elements), and execute the program. In another example, a program for causing a processor to function as one or more of the above constituent elements may be installed on the eNB800, and the wireless communication interface 825 (e.g., the BB processor 826) and/or the controller 821 may execute the program. In this way, the eNB800, the base station apparatus 820, or the module may be provided as an apparatus including one or more constituent elements, and a program for causing a processor to function as one or more constituent elements may be provided. Further, a readable recording medium recording the program may also be provided.

Further, in the eNB800 shown in fig. 12, the wireless communication unit 120 described with reference to fig. 6 may be implemented in the wireless communication interface 825 (e.g., the RF circuit 827). Further, the antenna unit 110 may be implemented in the antenna 810. Further, the network communication unit 130 may be implemented in the controller 821 and/or the network interface 823. Further, the storage unit 140 may be implemented in the memory 822.

(second application example)

Fig. 13 is a block diagram illustrating a second example of a schematic configuration of an eNB to which techniques according to the present disclosure may be applied. eNB 830 includes one or more antennas 840, base station apparatus 850, and RRHs 860. Each of the antenna 840 and the RRH 860 may be connected to each other through an RF cable. Further, the base station apparatus 850 and RRH 860 may be connected to each other by a high-speed line such as an optical fiber cable.

Each of the antennas 840 includes a single antenna element or a plurality of antenna elements (e.g., a plurality of antenna elements included in a MIMO antenna), and the antennas 840 are used for wireless signals transmitted and received by the RRHs 860. As shown in fig. 13, the eNB 830 includes multiple antennas 840, and the multiple antennas 840 may, for example, correspond to multiple frequency bands used by the eNB 830. Note that although the eNB 830 includes multiple antennas 840 in the example shown in fig. 13, the eNB 830 may include a single antenna 840.

Base station apparatus 850 includes a controller 851, memory 852, network interface 853, wireless communication interface 855, and connection interface 857. The controller 851, memory 852, and network interface 853 are similar to the controller 821, memory 822, and network interface 823 described with reference to fig. 12.

The wireless communication interface 855 supports cellular communication such as LTE and LTE-advanced, and provides wireless connectivity through the RRH 860 and the antenna 840 to terminals located in a sector corresponding to the RRH 860. The wireless communication interface 855 may generally include the BB processor 856 or the like. The BB processor 856 is similar to the BB processor 826 described with reference to fig. 12, except that the BB processor 856 is connected to the RF circuitry 864 of the RRH 860 through a connection interface 857. As shown in fig. 13, the wireless communication interface 855 includes a plurality of BB processors 856, and the plurality of BB processors 856 can correspond to a plurality of frequency bands used by the eNB 830, for example. Note that although wireless communication interface 855 includes multiple BB processors 856 in the example shown in fig. 13, wireless communication interface 855 may include a single BB processor 856.

Connection interface 857 is an interface for connecting base station apparatus 850 (wireless communication interface 855) to RRH 860. Connection interface 857 may be a communication module for performing communication through a high-speed line, which connects base station apparatus 850 (wireless communication interface 855) and RRH 860.

Further, RRH 860 includes a connection interface 861 and a wireless communication interface 863.

The connection interface 861 is an interface for connecting the RRH 860 (wireless communication interface 863) to the base station apparatus 850. The connection interface 861 may be a communication module for performing communication over a high-speed line.

wireless communication interface 863 sends and receives wireless signals through antenna 840. The wireless communication interface 863 can generally include RF circuitry 864 and the like. The RF circuit 864 may include mixers, filters, amplifiers, and the like, and the RF circuit 864 transmits and receives wireless signals through the antenna 840. As shown in fig. 13, the wireless communication interface 863 includes a plurality of RF circuits 864, and the plurality of RF circuits 864 may correspond to a plurality of antenna elements, for example. Note that although the wireless communication interface 863 includes the plurality of RF circuits 864 in the example shown in fig. 13, the wireless communication interface 863 may include a single RF circuit 864.

In the eNB 830 shown in fig. 13, one or more constituent elements (the setting unit 151 and/or the communication processing unit 153) included in the base station apparatus 100 described with reference to fig. 6 may be implemented in the wireless communication interface 855 and/or the wireless communication interface 863. Alternatively, at least a part of the constituent elements may be implemented in the controller 851. For example, a module including a part (e.g., BB processor 856) or all of wireless communication interface 855 and/or controller 851 may be installed on eNB 830, and one or more constituent elements may be implemented in the module. In this case, the module may store a program for causing the processor to function as one or more constituent elements (in other words, a program for causing the processor to execute the operation of one or more constituent elements), and execute the program. In another example, a program for causing a processor to function as one or more constituent elements may be installed on eNB 830, and wireless communication interface 855 (e.g., BB processor 856) and/or controller 851 may execute the program. In this way, the eNB 830, the base station apparatus 850, or the module may be provided as an apparatus including one or more constituent elements, and a program for causing a processor to function as one or more constituent elements may be provided. Further, a readable recording medium recording the program may also be provided.

In addition, in the eNB 830 shown in fig. 13, the wireless communication unit 120 described with reference to fig. 6 may be implemented, for example, in the wireless communication interface 863 (e.g., the RF circuit 864). Furthermore, the antenna element 110 may be implemented in the antenna 840. Further, the network communication unit 130 may be implemented in the controller 851 and/or the network interface 853. Further, storage unit 140 may be implemented in memory 852.

<4.2. application example with respect to terminal apparatus >

(first application example)

Fig. 14 is a block diagram illustrating an example of a schematic configuration of a smartphone 900 to which techniques according to the present disclosure may be applied. The smartphone 900 includes a processor 901, memory 902, storage 903, an external connection interface 904, a camera 906, a sensor 907, a microphone 908, an input device 909, a display device 910, a speaker 911, a wireless communication interface 912, one or more antenna switches 915, one or more antennas 916, a bus 917, a battery 918, and an auxiliary controller 919.

The processor 901 may be, for example, a CPU or a SoC (system on chip), and the processor 901 controls functions of an application layer and other layers of the smartphone 900. The memory 902 includes a RAM and a ROM, and stores programs and data executed by the processor 901. The storage 903 may include storage media such as a semiconductor memory and a hard disk. The external connection interface 904 is an interface for connecting external devices such as a memory card and a USB (universal serial bus) device to the smartphone 900.

The camera 906 includes, for example, an imaging element such as a CCD (charge coupled device) and a CMOS (complementary metal oxide semiconductor), and generates a captured image. The sensors 907 may include, for example, a sensor group such as a positioning sensor, a gyro sensor, a geomagnetic sensor, and an acceleration sensor. The microphone 908 converts sound input to the smartphone 900 into a sound signal. The input device 909 includes, for example, a touch sensor, a keypad, a keyboard, buttons, switches, and the like for detecting a touch to the screen of the display device 910, and receives an input of an operation or information from a user. The display device 910 includes a screen such as a Liquid Crystal Display (LCD) and an Organic Light Emitting Diode (OLED) display, and displays an output image of the smart phone 900. The speaker 911 converts a sound signal output from the smart phone 900 into sound.

The wireless communication interface 912 supports a cellular communication manner such as LTE and LTE-advanced, and performs wireless communication. The wireless communication interface 912 may generally include a BB processor 913, RF circuitry 914, and the like. The BB processor 913 can perform, for example, encoding/decoding, modulation/demodulation, multiplexing/demultiplexing, and the like, and the BB processor 913 performs various types of signal processing for wireless communication. On the other hand, the RF circuit 914 may include a mixer, a filter, an amplifier, and the like, and the RF circuit 914 transmits and receives a wireless signal through the antenna 916. The wireless communication interface 912 may be a single chip module integrated with the BB processor 913 and the RF circuit 914. As shown in fig. 14, the wireless communication interface 912 may include a plurality of BB processors 913 and a plurality of RF circuits 914. Note that although the wireless communication interface 912 includes a plurality of BB processors 913 and a plurality of RF circuits 914 in the example shown in fig. 14, the wireless communication interface 912 may include a single BB processor 913 or a single RF circuit 914.

In addition, the wireless communication interface 912 may support other types of wireless communication modes such as a short-range wireless communication mode, a near field wireless communication mode, and a wireless LAN (local area network) mode in addition to the cellular communication mode, and in this case, the wireless communication interface 912 may include a BB processor 913 and an RF circuit 914 for each wireless communication mode.

Each antenna switch 915 switches the destination of the antenna 916 among a plurality of circuits (e.g., circuits for different wireless communication modes) included in the wireless communication interface 912.

Each antenna 916 includes a single antenna element or multiple antenna elements (e.g., multiple antenna elements included in a MIMO antenna) and is used for wireless signals transmitted and received by the wireless communication interface 912. As shown in fig. 14, the smart phone 900 may include multiple antennas 916. Note that although the smartphone 900 includes multiple antennas 916 in the example shown in fig. 14, the smartphone 900 may include a single antenna 916.

Additionally, the smartphone 900 may include an antenna 916 for each wireless communication means. In that case, the antenna switch 915 may be removed from the configuration of the smartphone 900.

The bus 917 interconnects the processor 901, the memory 902, the storage 903, the external connection interface 904, the camera 906, the sensor 907, the microphone 908, the input device 909, the display device 910, the speaker 911, the wireless communication interface 912, and the auxiliary controller 919. The battery 918 supplies power to each block of the smartphone 900 shown in fig. 14 through a power line indicated partially by a dotted line in fig. 14. The secondary controller 919 enables the smartphone 900 to operate minimum necessary functions in, for example, a sleep mode.

In the smartphone 900 shown in fig. 14, one or more constituent elements (the setting unit 241 and/or the communication processing unit 243) included in the URLLC terminal 200 described with reference to fig. 7 may be implemented in the wireless communication interface 912. Alternatively, at least a part of constituent elements may be implemented in the processor 901 or the secondary controller 919. For example, a module including part (e.g., the BB processor 913) or all of the wireless communication interface 912, the processor 901, and/or the auxiliary controller 919 may be mounted on the smartphone 900, and one or more of the constituent elements may be implemented in the module. In this case, the module may store a program for causing the processor to function as one or more of the constituent elements (in other words, a program for causing the processor to execute the operation of one or more of the constituent elements), and execute the program. In another example, a program for causing a processor to function as one or more of the constituent elements may be installed on the smartphone 900, and the wireless communication interface 912 (e.g., BB processor 913), processor 901, and/or secondary controller 919 may execute the program. In this way, the smartphone 900 or module may be provided as a device including one or more of the constituent elements, and a program for causing a processor to function as one or more of the constituent elements may be provided. Further, a readable recording medium recording the program may also be provided.

In addition, in the smartphone 900 shown in fig. 14, the wireless communication unit 220 described with reference to fig. 7 may be implemented in, for example, the wireless communication interface 912 (e.g., the RF circuit 914). Further, the antenna element 210 may be implemented in the antenna 916. Further, the storage unit 230 may be implemented in the memory 902.

(second application example)

Fig. 15 is a block diagram showing an example of a schematic configuration of a car navigation device 920 to which the technique according to the present disclosure can be applied. The car navigation device 920 includes a processor 921, a memory 922, a GPS (global positioning system) module 924, sensors 925, a data interface 926, a content player 927, a storage medium interface 928, an input device 929, a display device 930, a speaker 931, a wireless communication interface 933, one or more antenna switches 936, one or more antennas 937, and a battery 938.

The processor 921 may be, for example, a CPU or an SoC, and the processor 921 controls the navigation function and other functions of the car navigation device 920. The memory 922 includes a RAM and a ROM, and stores programs and data executed by the processor 921.

The GPS module 924 measures the position (e.g., latitude, longitude, and altitude) of the car navigation device 920 using GPS signals received from GPS satellites. The sensors 925 may include, for example, a sensor group such as a gyro sensor, a geomagnetic sensor, and a pressure sensor. The data interface 926 is connected to, for example, an in-vehicle network 941 through a terminal not shown, and the data interface 926 acquires data generated on the vehicle side, such as vehicle speed data.

The content player 927 reproduces content stored in a storage medium (e.g., a CD or DVD) inserted in the storage medium interface 928. The input device 929 includes, for example, a touch sensor, a button, a switch, or the like that detects a touch on the screen of the display device 930, and receives an input of an operation or information from a user. The display device 930 includes a screen such as an LCD or OLED display, and displays a navigation function or an image of content to be reproduced. The speaker 931 outputs a navigation function or a sound of content to be reproduced.

The wireless communication interface 933 supports a cellular communication system such as LTE and LTE-advanced, and performs wireless communication. Wireless communication interface 933 may generally include BB processor 934, RF circuitry 935, and the like. The BB processor 934 may perform, for example, encoding/decoding, modulation/demodulation, multiplexing/demultiplexing, and the like, and the BB processor 934 performs various types of signal processing for wireless communication. On the other hand, the RF circuit 935 may include a mixer, a filter, an amplifier, and the like, and the RF circuit 935 transmits and receives a wireless signal through the antenna 937. The wireless communication interface 933 may be a single-chip module integrated with the BB processor 934 and the RF circuit 935. As shown in fig. 15, the wireless communication interface 933 can include multiple BB processors 934 and multiple RF circuits 935. Note that although the wireless communication interface 933 includes multiple BB processors 934 and multiple RF circuits 935 in the example shown in fig. 15, the wireless communication interface 933 may include a single BB processor 934 or a single RF circuit 935.

In addition, the wireless communication interface 933 may support other types of wireless communication modes such as a short-range wireless communication mode, a near-field wireless communication mode, and a wireless LAN mode in addition to the cellular communication mode, and in that case, the wireless communication interface 933 may include a BB processor 934 and an RF circuit 935 for each wireless communication mode.

Each antenna switch 936 switches the destination of the antenna 937 among a plurality of circuits (for example, circuits for different wireless communication modes) included in the wireless communication interface 933.

Each antenna 937 includes a single antenna element or multiple antenna elements (e.g., multiple antenna elements included in a MIMO antenna), and the antenna 937 is used for wireless signals transmitted and received by the wireless communication interface 933. As shown in fig. 15, the car navigation device 920 may include a plurality of antennas 937. Note that although the car navigation device 920 includes the plurality of antennas 937 in the example shown in fig. 15, the car navigation device 920 may include a single antenna 937.

In addition, the car navigation device 920 may include an antenna 937 for each wireless communication manner. In that case, the antenna switch 936 may be removed from the configuration of the car navigation device 920.

The battery 938 supplies electric power to each block of the car navigation device 920 shown in fig. 15 through a power line indicated partially by a dotted line in fig. 15. Further, the battery 938 stores electric power supplied from the vehicle side.

In the car navigation device 920 shown in fig. 15, one or more constituent elements (the setting unit 241 and/or the communication processing unit 243) included in the URLLC terminal 200 described with reference to fig. 7 can be implemented in the wireless communication interface 933. Alternatively, at least a portion of the constituent elements may be implemented in the processor 921. For example, a module including part (e.g., the BB processor 934) or all of the wireless communication interface 933 and/or the processor 921 may be mounted on the car navigation device 920, and one or more of the constituent elements may be implemented in the module. In this case, the module may store a program for causing the processor to function as one or more of the constituent elements (in other words, a program for causing the processor to execute the operation of one or more of the constituent elements), and execute the program. In another example, a program for causing the processor to function as one or more of the constituent elements may be installed on the car navigation device 920, and the wireless communication interface 933 (e.g., the BB processor 934) and/or the processor 921 may execute the program. In this way, the car navigation device 920 or the module may be provided as a device including one or more of the constituent elements, and a program for causing the processor to function as one or more of the constituent elements may be provided. Further, a readable recording medium recording the program may also be provided.

In addition, in the car navigation device 920 shown in fig. 15, the wireless communication unit 220 described with reference to fig. 7 may be implemented in, for example, a wireless communication interface 933 (e.g., an RF circuit 935). Further, the antenna unit 210 may be implemented in the antenna 937. Further, the storage unit 230 may be implemented in the memory 922.

Further, the technology according to the present disclosure may be implemented as an in-vehicle system (or vehicle) 940 including one or more blocks in the car navigation device 920, an in-vehicle network 941, and a vehicle-side module 942. The vehicle-side module 942 generates vehicle-side data such as a vehicle speed, an engine rotation speed, and failure information, and outputs the generated data to the in-vehicle network 941.

<5. conclusion >

An embodiment of the present disclosure has been described in detail with reference to fig. 1 to 15. As described above, the URLLC terminal 200 according to the present embodiment is a terminal apparatus that communicates with the base station apparatus 100 that receives URLLC data for license exempt transmission and eMBB data for license based transmission. The URLLC terminal 200 receives from the base station apparatus 100 a static or quasi-static setting regarding the resources available for the unlicensed transmission. On the other hand, the URLLC terminal 200 receives the downlink control channel including the grant-less transmission parameter information in a predetermined first time slot. In addition, the URLLC terminal 200 generates URLLC data based on the grant-less transmission parameter information, and transmits the URLLC data using an uplink resource selected from the available resources for grant-less transmission. In this way, the URLLC terminal 200 uses the dynamically controlled unlicensed transmission parameter information to transmit in the statically or quasi-statically set unlicensed transmission available resources. Accordingly, the URLLC terminal 200 can appropriately update the parameter information for the unlicensed transmission to the optimum parameter information according to the presence or absence of interference that dynamically occurs between URLLC data and eMBB data. As a result, the transmission efficiency of the entire system can be improved.

Although the preferred embodiments of the present disclosure have been described in detail with reference to the accompanying drawings, the technical scope of the present disclosure is not limited to examples. It is apparent that a person having ordinary knowledge in the technical field of the present disclosure can conceive various changes or modifications within the technical idea described in the claims and should understand that they obviously belong to the technical scope of the present disclosure.

for example, although dynamic resource sharing of URLLC data and eMBB data has been described above, the present techniques are not limited to examples. For example, the present technology may be applied to dynamic resource sharing of two types or three or more types including other data such as mtc data.

Further, the processes described by using the flowcharts and the sequence diagrams in this specification may be performed out of the order shown. Some of the processing steps may be performed in parallel. Furthermore, additional processing steps may be employed, and portions of the processing steps may be eliminated.

Furthermore, the benefits described in this specification are merely illustrative or exemplary, and not restrictive. That is, other advantageous effects that are obvious to those skilled in the art from the description of the present specification may be achieved according to the technology of the present disclosure in addition to or instead of the advantageous effects.

Note that the following configuration also belongs to the technical scope of the present disclosure.

(1) A communication apparatus that communicates with a base station apparatus that receives first uplink data of a grant-less transmission and second uplink data of a grant-based transmission, comprising:

A setting unit that performs setting on an unlicensed transmission available resource based on setting information received from a base station apparatus; and

A communication processing unit that receives a downlink control channel including parameter information for license-exempt transmission in a predetermined first slot, and transmits first uplink data generated based on the parameter information using an uplink resource selected from available resources for license-exempt transmission.

(2) The communication apparatus according to (1), wherein

The first slot is determined based on a transmission time interval of second uplink data that is longer than the first uplink data.

(3) The communication apparatus according to (1) or (2), wherein

The communication processing unit monitors a downlink control channel in a first slot.

(4) The communication apparatus according to any one of (1) to (3), wherein

In a case where the parameter information is not detected in the first slot, first uplink data is generated based on predetermined parameter information.

(5) The communication apparatus according to any one of (1) to (4), wherein

The application period of the parameter information is determined based on a transmission time interval of second uplink data longer than the first uplink data.

(6) the communication apparatus according to (5), wherein

The relationship between the first slot and the second slot of the preamble slot as the application period of the parameter information is set exclusively for the communication apparatus.

(7) The communication apparatus according to (6), wherein

The communication processing unit transmits terminal capability information regarding a time difference between the first slot and the second slot to the base station apparatus.

(8) The communication apparatus according to any one of (1) to (7), wherein

The parameter information is determined based on whether there is second uplink data.

(9) The communication apparatus according to (8), wherein

The second uplink data is transmitted by using orthogonal resources that are at least partially the same as the resources available for unlicensed transmission.

(10) The communication apparatus according to any one of (1) to (9), wherein

The parameter information includes information on a modulation scheme and/or a coding rate.

(11) The communication apparatus according to any one of (1) to (10), wherein

the parameter information includes information on transmission power.

(12) The communication apparatus according to any one of (1) to (11), wherein

the parameter information includes information on a transmission method related to a non-orthogonal domain.

(13) The communication apparatus according to any one of (1) to (12), wherein

The parameter information includes information on the number of repetitions of data transmission.

(14) the communication apparatus according to any one of (1) to (13), wherein

The parameter information includes information on a signal waveform.

(15) The communication apparatus according to any one of (1) to (14), wherein

The downlink control channel is generated based on scrambling information included in the setting information.

(16) A base station apparatus that communicates with a first communication apparatus for grant-less transmission of first uplink data and a second communication apparatus for grant-based transmission of second uplink data, the base station apparatus comprising:

A setting unit that transmits setting information on an available resource for unlicensed transmission to a first communication apparatus; and

a communication processing unit that transmits a downlink control channel including parameter information for unlicensed transmission in a predetermined first slot, and receives first uplink data generated based on the parameter information, the first uplink data being transmitted from the first communication device using an uplink resource selected from resources available for unlicensed transmission.

(17) A method performed by a communication device in communication with a base station device that receives first uplink data for grant-less transmission and second uplink data for grant-based transmission, the method comprising:

Performing setting on an available resource for unlicensed transmission based on setting information received from the base station apparatus; and

A downlink control channel including parameter information for unlicensed transmission is received in a predetermined first slot, and first uplink data generated based on the parameter information is transmitted using an uplink resource selected from available resources for unlicensed transmission.

(18) A method performed by a base station apparatus in communication with a first communication apparatus for grant-less transmission of first uplink data and a second communication apparatus for grant-based transmission of second uplink data, the method comprising:

Transmitting setting information on resources available for the unlicensed transmission to the first communication device; and

A downlink control channel including parameter information for unlicensed transmission is transmitted in a predetermined first slot, and first uplink data generated based on the parameter information is received, the first uplink data being transmitted from a first communication apparatus using an uplink resource selected from available resources for unlicensed transmission.

(19) A recording medium recording a program for causing a computer to function as:

A communication apparatus that communicates with a base station apparatus that receives first uplink data of a grant-less transmission and second uplink data of a grant-based transmission, the communication apparatus comprising:

(20) A recording medium recording a program for causing a computer to function as:

a base station apparatus that communicates with a first communication apparatus for grant-less transmission of first uplink data and a second communication apparatus for grant-based transmission of second uplink data, the base station apparatus comprising:

List of reference numerals

1 System

11 cell

20 core network

30PDN (packet data network)

50 unlicensed transmission of available resources

51 unused resources

52 used resources

60 grant based transmission resources

100 base station device

110 antenna unit

120 radio communication unit

130 network communication unit

140 memory cell

150 control unit

151 setting unit

153 communication processing unit

200 terminal device and URLLC terminal

210 antenna unit

220 wireless communication unit

230 memory cell

240 control unit

241 setting unit

243 communication processing unit

300 terminal device, eMBB terminal

Claims

1. A communication apparatus that communicates with a base station apparatus that receives first uplink data of a grant-less transmission and second uplink data of a grant-based transmission, the communication apparatus comprising:

A setting unit that performs setting on an unlicensed transmission available resource based on setting information received from the base station apparatus; and

A communication processing unit that receives a downlink control channel including parameter information for unlicensed transmission in a predetermined first slot and transmits first uplink data generated based on the parameter information using an uplink resource selected from among the resources available for unlicensed transmission.

2. The communication device of claim 1, wherein

3. The communication device of claim 1, wherein

The communication processing unit monitors the downlink control channel in a first slot.

4. The communication device of claim 1, wherein

5. The communication device of claim 1, wherein

Determining an application period of the parameter information based on a transmission time interval of second uplink data longer than the first uplink data.

6. The communication device of claim 5, wherein

Setting a relationship between the first slot and a second slot that is a preamble slot of an application period of the parameter information exclusively for the communication apparatus.

7. The communication device of claim 6, wherein

The communication processing unit transmits terminal capability information on a time difference between a first slot and a second slot to the base station apparatus.

8. The communication device of claim 1, wherein

Determining the parameter information based on whether there is second uplink data.

9. The communication device of claim 8, wherein

Transmitting second uplink data by using at least partially the same orthogonal resources as the grant-free transmission available resources.

10. The communication device of claim 1, wherein

11. The communication device of claim 1, wherein

The parameter information includes information on transmission power.

12. The communication device of claim 1, wherein

13. The communication device of claim 1, wherein

14. The communication device of claim 1, wherein

The parameter information includes information on a signal waveform.

15. The communication device of claim 1, wherein

Generating the downlink control channel based on scrambling information included in the setting information.

16. A base station apparatus that communicates with a first communication apparatus for grant-less transmission of first uplink data and a second communication apparatus for grant-based transmission of second uplink data, the base station apparatus comprising:

A communication processing unit that transmits a downlink control channel including parameter information for unlicensed transmission in a predetermined first slot, and receives first uplink data generated based on the parameter information, the first uplink data being transmitted from a first communication device using an uplink resource selected from the resources available for unlicensed transmission.

17. A method performed by a communication device in communication with a base station device that receives first uplink data for grant-less transmission and second uplink data for grant-based transmission, the method comprising:

Performing setting on an unlicensed transmission available resource based on setting information received from the base station apparatus; and

a downlink control channel including parameter information for unlicensed transmission is received in a predetermined first slot, and first uplink data generated based on the parameter information is transmitted using an uplink resource selected from among available resources for unlicensed transmission.

18. a method performed by a base station apparatus in communication with a first communication apparatus for grant-less transmission of first uplink data and a second communication apparatus for grant-based transmission of second uplink data, the method comprising:

A downlink control channel including parameter information for unlicensed transmission is transmitted in a predetermined first slot, and first uplink data generated based on the parameter information is received, the first uplink data being transmitted from a first communication apparatus using an uplink resource selected from the resources available for unlicensed transmission.

19. A recording medium recording a program for causing a computer to function as:

20. A recording medium recording a program for causing a computer to function as: